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Learn about the SMS sending numbers for every country that Klaviyo can send to, including what each number type can do.
US Short Code Brand Vetting is a mandatory compliance requirement established by the CTIA and enforced through the US Short Code Registry. The purpose of this annual verification is to ensure that each brand using a US short code is accurately identified, properly registered, and accountable for the messages they send to consumers. By confirming up-to-date business and contact information, carriers can maintain trust in high-volume messaging programs and reduce the risk of fraud, spam, and consumer harm.
Learn about the short code application process, including what you need to apply, how long it takes, and more.
Learn about toll-free number verification, including what it means to be verified and how this works in Klaviyo.
Find out how to request or register a long code so that you can start sending SMS.
Learn about branded sender IDs in Klaviyo, including how to set them up, where they’re available, and more.
Learn when to consider getting a short code, including why you might benefit and at what points a short code will be helpful.
Learn why a toll-free number might have been rejected for verification, and what you may be able to do if this happens.